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The Mona Lisa has No Eyebrows.

One long-standing mystery of the painting is why Mona Lisa features very faint eyebrows and apparently does not have any eyelashes. In October 2007, Pascal Cotte, a French engineer and inventor, says he discovered with a high-definition camera that Leonardo da Vinci originally did paint eyebrows and eyelashes. Creating an ultra-high resolution close-up that magnified Mona Lisa's face 24 times, Cotte says he found a single brushstroke of a single hair above the left eye. "One day I say, if I can find only one hair, only one hair of the eyebrow, I will have definitively the proof that originally Leonardo da Vinci had painted eyelash and eyebrow," said Cotte. The engineer claims that other eyebrow hairs that potentially could have appeared on the painting may have faded or been inadvertently erased by a poor attempt to clean the painting. In addition, Cotte says his work uncovered proof that her hands were originally painted in a slightly different position than in the final portrait.

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Walt Disney might have been the first to put gloves on his characters, as seen in 1929’s The Opry House starring Mickey Mouse. In addition to being easier to animate, there’s another reason Disney opted for gloves: “We didn’t want him to have mouse hands because he was supposed to be more human,” Disney told his biographer in 1957.

Information Source : Reader's Digest
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That tiny pocket in jeans was designed to store pocket watches. The original jeans only had four pockets: that tiny one, plus two more on the front and just one in the back.

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Blue whales eat half a million calories in one mouthful. Those 457,000 calories are more than 240 times the energy the whale uses to scoop those krill into its mouth.

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OCTOPUSES LAY 56,000 EGGS AT A TIME

The mother spends six months so devoted to protecting the eggs that she doesn’t eat. The babies are the size of a grain of rice when they’re born.

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According to Merriam-Webster, a nut is only a nut if it’s “a hard-shelled dry fruit or seed with a separable rind or shell and interior kernel.” That means walnuts, almonds, cashews, and pistachios aren’t nuts either. They’re seeds.

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You’ll find a Z in Arizona, a J in New Jersey, and even two X’s in New Mexico and Texas ; but not a single Q.

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The North Island of New Zealand has a place named Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu. The 1,000-foot hill near the township Porangahau holds the Guinness World Record for longest place name with 85 characters.

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Only three countries – the U.S., Liberia and Myanmar – still (mostly or officially) stick to the imperial system, which uses distances, weight, height or area measurements that can ultimately be traced back to body parts or everyday items. Other than in the metric system these units are not easily divisible in parts of hundreds or thousands and are therefore thought to be inferior to those in the metric system by some. Critics of the metric system which was created for easy reference accuse it of being arbitrary in return.

The United States is the only real stronghold of the imperial system in the world to-date. Here, using miles and gallons is the norm, even though scientists do use metric, new units like megabytes and megapixels are metric as well and runners compete for 100 meters like everywhere else in the world. Myanmar and Liberia are the only other countries in the world that haven’t officially adopted the metric system yet. In both countries, metric measurements are used alongside imperial ones.

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Silence is golden, as they say. And while it may not be worth quite as much as jewels and gold to most people, it certainly was the primary goal for those who built the quietest room in the world.

Located at Microsoft's headquarters in Redmond, Washington, the lab room measures a background noise of -20.35 dBA, which is 20 decibels below the threshold of human hearing and breaks previous records for spaces that were deemed the planet's quietest places.

It is currently registered in the Guinness World Record as the world's quietest place, a title it claimed in 2015 at the expense of a similar chamber at Orfield Labs in Minneapolis. But unlike Microsoft's, that chamber is open to the public, which has turned it into a small tourist attraction.

In this room at Microsoft's headquarters, all sound from the outside world is locked out and any sound produced inside is stopped cold. It's called an "anechoic" chamber, because it creates no echo at all -- which makes the sound of clapping hands downright eerie.

The background noise in the room is so low that it approaches the lowest threshold theorized by mathematicians, the absolute zero of sound -- the next step down is a vacuum, or the absence of sound.

This is the world's quietest place.

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On Earth Day, 22 April 2016, 175 world leaders signed the Paris Agreement at United Nations Headquarters in New York. This was by far the largest number of countries ever to sign an international agreement on a single day. There are now 186 countries that have ratified the Paris Agreement.

The Agreement aimed to combat climate change and accelerate and intensify the actions and investments needed to strengthen the global climate effort.

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